4221361 has 2 divisors, whose sum is σ = 4221362. Its totient is φ = 4221360.

The previous prime is 4221337. The next prime is 4221379. The reversal of 4221361 is 1631224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3779136 + 442225 = 1944^2 + 665^2 .

It is a cyclic number.

It is not a de Polignac number, because 4221361 - 2¹⁹ = 3697073 is a prime.

It is not a weakly prime, because it can be changed into another prime (4221311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2110680 + 2110681.

It is an arithmetic number, because the mean of its divisors is an integer number (2110681).

Almost surely, 2^4221361 is an apocalyptic number.

It is an amenable number.

4221361 is a deficient number, since it is larger than the sum of its proper divisors (1).

4221361 is an equidigital number, since it uses as much as digits as its factorization.

4221361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 19.

The square root of 4221361 is about 2054.5950939297. The cubic root of 4221361 is about 161.6159295680.

Adding to 4221361 its reverse (1631224), we get a palindrome (5852585).

The spelling of 4221361 in words is "four million, two hundred twenty-one thousand, three hundred sixty-one".